clustering vs collation

clustering

noun
  • A grouping of a number of similar things. 

  • The undesirable contiguous grouping of elements in a hash table. 

  • A prewriting technique consisting of writing ideas down on a sheet of paper around a central idea within a circle, with the related ideas radially joined to the circle using rays. 

  • The grouping of a population based on ethnicity, economics or religion. 

adj
  • Forming a cluster. 

collation

noun
  • A collection, a gathering. 

  • An heir's right to combine the whole heritable and movable estates of the deceased into one mass, sharing it equally with others who are of the same degree of kindred. 

  • The presentation of a clergyman to a benefice by a bishop, who has it in his own gift. 

  • Presentation to a benefice. 

  • A reading held from the work mentioned above, as a regular service in Benedictine monasteries. 

  • Any light meal or snack. 

  • The blending together of property so as to achieve equal division, mainly in the case of inheritance. 

  • The Collationes Patrum in Scetica Eremo Commorantium by John Cassian, an important ecclesiastical work. (Now usually with capital initial.) 

  • The act of bringing things together and comparing them; comparison. 

  • The act of collating pages or sheets of a book, or from printing etc. 

  • The specification of how character data should be treated stored and sorted. 

  • The light meal taken by monks after the reading service mentioned above. 

How often have the words clustering and collation occurred in a corpus of books? (source: Google Ngram Viewer )